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Finding the Fourth Proportional to 71,897.76, 99,220.95 and 40,066.38

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Solution

The fourth proportional to 71,897.76, 99,220.95 and 40,066.38 is: 55,292.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,897.76 : 99,220.95 = 40,066.38 : x
  2. Step 2: Convert to fraction form
    71,897.76/99,220.95 = 40,066.38/x
  3. Step 3: Cross multiply
    71,897.76x = 99,220.95 × 40,066.38
  4. Step 4: Simplify right side
    71,897.76x = 3,975,424,286.66
  5. Step 5: Solve for x
    x = 3,975,424,286.66/71,897.76
  6. Step 6: Final answer
    x = 55,292.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.